From 5aa103d050a3985a691d3cb0c4d2f1055d523cd1 Mon Sep 17 00:00:00 2001
From: "Michael B. Gale" <mbg@github.com>
Date: Mon, 12 Oct 2026 15:52:22 +0100
Subject: [PATCH] Add `InstanceURL` and use in `DownloadSource`

---
 src/setup/repository.ts | 4 ++--
 src/util.ts             | 5 ++++-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/setup/repository.ts b/src/setup/repository.ts
index 2e5387297..959ca4b8d 100644
--- a/src/setup/repository.ts
+++ b/src/setup/repository.ts
@@ -3,7 +3,7 @@ import { isRunningLocalAction } from "../actions-util";
 import * as api from "../api-client";
 import { ActionsEnvVars } from "../environment";
 import { isRepositoryNwoStr, type RepositoryNwoStr } from "../repository";
-import { GITHUB_DOTCOM_URL } from "../util";
+import { GITHUB_DOTCOM_URL, type InstanceURL } from "../util";
 
 /** The NWO of the standard CodeQL Action repository. */
 export const CODEQL_DEFAULT_ACTION_REPOSITORY = "github/codeql-action";
@@ -43,7 +43,7 @@ export function getCodeQLActionRepository(
 }
 
 /**A download source is a pair of strings. */
-export type DownloadSource = [string, RepositoryNwoStr];
+export type DownloadSource = [InstanceURL, RepositoryNwoStr];
 
 /** GitHub.com, and the canonical Action. */
 export const DEFAULT_DOWNLOAD_SOURCE: DownloadSource = [
diff --git a/src/util.ts b/src/util.ts
index 3a42d8b94..0b10e0f04 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -46,10 +46,13 @@ const BASE_DATABASE_OIDS_FILE_NAME = "base-database-oids.json";
  */
 const BROKEN_VERSIONS = ["0.0.0-20211207"];
 
+/** A string representing a GitHub instance. */
+export type InstanceURL = string;
+
 /**
  * The URL for github.com.
  */
-export const GITHUB_DOTCOM_URL = "https://github.com";
+export const GITHUB_DOTCOM_URL: InstanceURL = "https://github.com";
 
 /**
  * Default name of the debugging artifact.